The Freemasons appropriated the pyramid as part of their iconography, but that doesn't mean that masonic innuendoes rub off on every depiction of a pyramid, or a triangle, for that matter.
The Goths wear cricifixes, but I've never seen a punk church, have you? Let's go!

As far as any prohibitions about using membership in Freemasons for personal gain, it sounds sensible! Occult underpinnings do not necessarily preclude acting ethically towards the public.

I would wonder, though, especially in the Blue Lodges, if certain "arrangements" aren't made in secret that are then carried out in the open. All the better to deny any overt leverage of power or position within their ranks.